package com.car.car.utils;

import java.util.Random;

public class KeyUtil {



    /*
     *  weiyi zhujian
     */
    public static synchronized String genUniqueKey(){
        Random random = new Random();

        Integer number = random.nextInt(9000) + 1000;

        return System.currentTimeMillis()+String.valueOf(number);
    }
}
